I DO have something against a FFM. I can't sleep with them, and they give you more surface to leak. I tried taping, which I decided would be less intrusive than a chin strap. I have a Sahara-dry mouth in the am, even if I tape (which ensures my mouth is closed all night). Just too much air blowing around back there!I don't have anything against a FFM but I don't like waking up with a dry mouth.
I find the best result with a nasal mask (I like the Nano), dry mouth gel, my bite guard, and tape.
YMMV. Good luck!